(Solved): Q4 a) Draw a T-s Diagram for the gas-turbine engine with a regenerator shown below in figure Q4. (5 ...

Q4 a) Draw a T-s Diagram for the gas-turbine engine with a regenerator shown below in figure Q4. (5 Marks) Figure Q4 b) A gas-turbine power plant at sea level operating on the Brayton cycle has a pressure ratio of 8. The temperature of gas at the inlet to the compressor is \( 400 \mathrm{~K} \) and temperature of gas at turbine inlet is \( 1500 \mathrm{~K} \). The isentropic efficiency of the compressor and turbine are given as \( 90 \% \). Utilizing appropriate air standard assumptions where necessary determine the following: Note: use \( \mathrm{K}=1.4 \) and also \( \mathrm{cp}=1.005 \mathrm{~kJ} / \mathrm{kgK} \) 1. Show the cycle on a T-s diagram (1 Marks) 2. Temperature of the gas at the exit of the compressor (4 Marks) 3. Temperature of the gas at exit from the turbine (4 Marks) 4. Network produced (4 Marks) 5. Specific heat into the cycle (3 Marks) 6. The back-work ratio (2 Marks) 7. Thermal efficiency. (2 Marks)